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Amazon’s advertising division is quickly becoming an important pillar of the company, and another sign of its growth came last week when the tech giant hosted a big advertising conference in Seattle.

Among the four competitiveness factors in the yearbook, China ranked second in "economic performance." China also topped the three sub-indices of "domestic economy", "employment" and "labor market."

Amazon’s relationship with the United States Postal Service for deliveries that has come under political scrutiny, and it is looking to take control of more of the process. Last year it unveiled a new program to help people start their own delivery businesses. And this holiday season it hired a fleet of seasonal drivers to help deliver packages.

Among the beneficiaries are companies that have moved production offshore. US President Donald Trump on Thursday visited Illinois and Iowa, the nation's leading soybean-producing states. While Trump said his use of tariffs and threats of tariffs have brought countries to the negotiating table, US farm groups are against it.

American Airlines Group Inc said Thursday it was extending cancellations of 737 MAX flights through April 6.